Win32_IRQResource - powershell.one

The Win32_IRQResource WMI class represents an interrupt request line (IRQ) number on a computer system running Windows. An interrupt request is a signal sent to the CPU by a device or program for time critical events. IRQ can be hardware-based or software-based.

Methods

Win32_IRQResource has no methods.

Properties

Win32_IRQResource returns 15 properties:

'Availability','Caption','CreationClassName','CSCreationClassName','CSName',
'Description','Hardware','InstallDate','IRQNumber','Name','Shareable','Status','TriggerLevel',
'TriggerType','Vector'

Unless explicitly marked as writeable, all properties are read-only. Read all properties for all instances:

Get-CimInstance -ClassName Win32_IRQResource -Property *

Most WMI classes return one or more instances.

When Get-CimInstance returns no result, then apparently no instances of class Win32_IRQResource exist. This is normal behavior.

Either the class is not implemented on your system (may be deprecated or due to missing drivers, i.e. CIM_VideoControllerResolution), or there are simply no physical representations of this class currently available (i.e. Win32_TapeDrive).

Availability

UINT16

Availability of the IRQ.

Other

Availability returns a numeric value. To translate it into a meaningful text, use any of the following approaches:

Use a PowerShell Hashtable

$Availability_map = @{
= 'Other'
= 'Unknown'
= 'Available'
= 'In Use/Not Available'
= 'In Use and Available/Shareable'
}

Use a switch statement

switch([int]$value)
{
  1          {'Other'}
  2          {'Unknown'}
  3          {'Available'}
  4          {'In Use/Not Available'}
  5          {'In Use and Available/Shareable'}
  default    {"$value"}
}

Use Enum structure

Enum EnumAvailability
{
  Other                           = 1
  Unknown                         = 2
  Available                       = 3
  In_UseNot_Available             = 4
  In_Use_and_AvailableShareable   = 5
}

Examples

Use $Availability_map in a calculated property for Select-Object

<# 
  this example uses a hashtable to translate raw numeric values for 
  property "Availability" to friendly text

  Note: to use other properties than "Availability", look up the appropriate 
  translation hashtable for the property you would like to use instead.
#>

#region define hashtable to translate raw values to friendly text

# Please note: this hashtable is specific for property "Availability" 
# to translate other properties, use their translation table instead
$Availability_map = @{
      1 = 'Other'
      2 = 'Unknown'
      3 = 'Available'
      4 = 'In Use/Not Available'
      5 = 'In Use and Available/Shareable'
}

#endregion define hashtable

#region define calculated property (to be used with Select-Object)

<#
  a calculated property is defined by a hashtable with keys "Name" and "Expression"
  "Name" defines the name of the property (in this example, it is "Availability", but you can rename it to anything else)
  "Expression" defines a scriptblock that calculates the content of this property
  in this example, the scriptblock uses the hashtable defined earlier to translate each numeric
  value to its friendly text counterpart:
#>
 
$Availability = @{
  Name = 'Availability'
  Expression = {
    # property is an array, so process all values
    $value = $_.Availability
    $Availability_map[[int]$value]
  }  
}
#endregion define calculated property

# retrieve the instances, and output the properties "Caption" and "Availability". The latter
# is defined by the hashtable in $Availability: 
Get-CimInstance -Class Win32_IRQResource | Select-Object -Property Caption, $Availability

# ...or dump content of property Availability:
$friendlyValues = Get-CimInstance -Class Win32_IRQResource | 
    Select-Object -Property $Availability |
    Select-Object -ExpandProperty Availability

# output values
$friendlyValues

# output values as comma separated list
$friendlyValues -join ', '

# output values as bullet list
$friendlyValues | ForEach-Object { "- $_" }

Use $Availability_map to directly translate raw values from an instance

<# 
  this example uses a hashtable to manually translate raw numeric values 
  for property "Win32_IRQResource" to friendly text. This approach is ideal when
  there is just one instance to work with.

  Note: to use other properties than "Win32_IRQResource", look up the appropriate 
  translation hashtable for the property you would like to use instead.
#>

#region define hashtable to translate raw values to friendly text

# Please note: this hashtable is specific for property "Win32_IRQResource" 
# to translate other properties, use their translation table instead
$Availability_map = @{
      1 = 'Other'
      2 = 'Unknown'
      3 = 'Available'
      4 = 'In Use/Not Available'
      5 = 'In Use and Available/Shareable'
}

#endregion define hashtable

# get one instance:
$instance = Get-CimInstance -Class Win32_IRQResource | Select-Object -First 1

<#
  IMPORTANT: this example processes only one instance to illustrate
  the number-to-text translation. To process all instances, replace
  "Select-Object -First 1" with a "Foreach-Object" loop, and use
  the iterator variable $_ instead of $instance
#>

# query the property
$rawValue = $instance.Availability  

# translate raw value to friendly text:
$friendlyName = $Availability_map[[int]$rawValue]

# output value
$friendlyName

Use a switch statement inside a calculated property for Select-Object

<# 
  this example uses a switch clause to translate raw numeric 
  values for property "Availability" to friendly text. The switch
  clause is embedded into a calculated property so there is
  no need to refer to external variables for translation.

  Note: to use other properties than "Availability", look up the appropriate 
  translation switch clause for the property you would like to use instead.
#>

#region define calculated property (to be used with Select-Object)

<#
  a calculated property is defined by a hashtable with keys "Name" and "Expression"
  "Name" defines the name of the property (in this example, it is "Availability", but you can rename it to anything else)
  "Expression" defines a scriptblock that calculates the content of this property
  in this example, the scriptblock uses the hashtable defined earlier to translate each numeric
  value to its friendly text counterpart:
#>
 
$Availability = @{
  Name = 'Availability'
  Expression = {
    # property is an array, so process all values
    $value = $_.Availability
    
    switch([int]$value)
      {
        1          {'Other'}
        2          {'Unknown'}
        3          {'Available'}
        4          {'In Use/Not Available'}
        5          {'In Use and Available/Shareable'}
        default    {"$value"}
      }
      
  }  
}
#endregion define calculated property

# retrieve all instances...
Get-CimInstance -ClassName Win32_IRQResource | 
  # ...and output properties "Caption" and "Availability". The latter is defined
  # by the hashtable in $Availability:
  Select-Object -Property Caption, $Availability

Use the Enum from above to auto-translate the code values

<# 
  this example translates raw values by means of type conversion
  the friendly names are defined as enumeration using the
  keyword "enum" (PowerShell 5 or better)
  
  The raw value(s) are translated to friendly text by 
  simply converting them into the enum type.
  
  Note: to use other properties than "Win32_IRQResource", look up the appropriate 
  enum definition for the property you would like to use instead.
#>


#region define enum with value-to-text translation:
Enum EnumAvailability
{
  Other                           = 1
  Unknown                         = 2
  Available                       = 3
  In_UseNot_Available             = 4
  In_Use_and_AvailableShareable   = 5
}

#endregion define enum

# get one instance:
$instance = Get-CimInstance -Class Win32_IRQResource | Select-Object -First 1

<#
  IMPORTANT: this example processes only one instance to focus on
  the number-to-text type conversion. 
  
  To process all instances, replace   "Select-Object -First 1" 
  with a "Foreach-Object" loop, and use the iterator variable 
  $_ instead of $instance
#>

# query the property:
$rawValue = $instance.Availability

#region using strict type conversion

<#
  Note: strict type conversion fails if the raw value is 
  not defined by the enum. So if the list of allowable values
  was extended and the enum does not match the value,
  an exception is thrown
#>

# convert the property to the enum **Availability** 
[EnumAvailability]$rawValue 

# get a comma-separated string:
[EnumAvailability]$rawValue -join ',' 
#endregion

#region using operator "-as"

<#
  Note: the operator "-as" accepts values not defined
  by the enum and returns $null instead of throwing
  an exception
#>

$rawValue -as [EnumAvailability]
#endregion

Enums must cover all possible values. If Availability returns a value that is not defined in the enum, an exception occurs. The exception reports the value that was missing in the enum. To fix, add the missing value to the enum.

Caption

STRING MAX 64 CHAR

Short description of the object a one-line string.

Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property IRQNumber, Caption

CreationClassName

STRING MAX 256 CHAR

Name of the first concrete class to appear in the inheritance chain used in the creation of an instance. When used with the other key properties of the class, the property allows all instances of this class and its subclasses to be uniquely identified.

Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property IRQNumber, CreationClassName

CSCreationClassName

STRING MAX 256 CHAR

Name of the scoping computer system creation class.

Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property IRQNumber, CSCreationClassName

CSName

STRING MAX 256 CHAR

Name of the scoping computer system.

Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property IRQNumber, CSName

Description

STRING

Textual description of the object.

Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property IRQNumber, Description

Hardware

BOOLEAN

If TRUE, the interrupt is hardware or software based. A hardware IRQ is a physical wire from the peripheral to the programmable interrupt controller (PIC) chip through which the CPU can be notified of time-critical events. Some IRQ lines are reserved for standard devices, such as the keyboard, floppy disk drives, and the system clock. A software interrupt allows applications to get the attention of the processor.

Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property IRQNumber, Hardware

InstallDate

DATETIME

Date and time the object was installed. This property does not need a value to indicate that the object is installed.

Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property IRQNumber, InstallDate

IRQNumber

KEY PROPERTY UINT32

Part of the object’s key value.

Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property IRQNumber

Name

STRING

Label by which the object is known. When subclassed, the property can be overridden to be a key property.

Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property IRQNumber, Name

Shareable

BOOLEAN

If TRUE, the IRQ can be shared.

Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property IRQNumber, Shareable

Status

STRING MAX 10 CHAR

Current status of an object. Various operational and nonoperational statuses can be defined. Available values:

$values = 'Degraded','Error','Lost Comm','No Contact','NonRecover','OK','Pred Fail','Service','Starting','Stopping','Stressed','Unknown'

Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property IRQNumber, Status

TriggerLevel

UINT16

IRQ trigger level indicating whether the interrupt is triggered by the hardware signal going high (4) or low (3).

TriggerLevel returns a numeric value. To translate it into a meaningful text, use any of the following approaches:

Use a PowerShell Hashtable

$TriggerLevel_map = @{
      1 = 'Other'
      2 = 'Unknown'
      3 = 'Active Low'
      4 = 'Active High'
}

Use a switch statement

switch([int]$value)
{
  1          {'Other'}
  2          {'Unknown'}
  3          {'Active Low'}
  4          {'Active High'}
  default    {"$value"}
}

Use Enum structure

Enum EnumTriggerLevel
{
  Other         = 1
  Unknown       = 2
  Active_Low    = 3
  Active_High   = 4
}

Examples

Use $TriggerLevel_map in a calculated property for Select-Object

<# 
  this example uses a hashtable to translate raw numeric values for 
  property "TriggerLevel" to friendly text

  Note: to use other properties than "TriggerLevel", look up the appropriate 
  translation hashtable for the property you would like to use instead.
#>

#region define hashtable to translate raw values to friendly text

# Please note: this hashtable is specific for property "TriggerLevel" 
# to translate other properties, use their translation table instead
$TriggerLevel_map = @{
      1 = 'Other'
      2 = 'Unknown'
      3 = 'Active Low'
      4 = 'Active High'
}

#endregion define hashtable

#region define calculated property (to be used with Select-Object)

<#
  a calculated property is defined by a hashtable with keys "Name" and "Expression"
  "Name" defines the name of the property (in this example, it is "TriggerLevel", but you can rename it to anything else)
  "Expression" defines a scriptblock that calculates the content of this property
  in this example, the scriptblock uses the hashtable defined earlier to translate each numeric
  value to its friendly text counterpart:
#>
 
$TriggerLevel = @{
  Name = 'TriggerLevel'
  Expression = {
    # property is an array, so process all values
    $value = $_.TriggerLevel
    $TriggerLevel_map[[int]$value]
  }  
}
#endregion define calculated property

# retrieve the instances, and output the properties "Caption" and "TriggerLevel". The latter
# is defined by the hashtable in $TriggerLevel: 
Get-CimInstance -Class Win32_IRQResource | Select-Object -Property Caption, $TriggerLevel

# ...or dump content of property TriggerLevel:
$friendlyValues = Get-CimInstance -Class Win32_IRQResource | 
    Select-Object -Property $TriggerLevel |
    Select-Object -ExpandProperty TriggerLevel

# output values
$friendlyValues

# output values as comma separated list
$friendlyValues -join ', '

# output values as bullet list
$friendlyValues | ForEach-Object { "- $_" }

Use $TriggerLevel_map to directly translate raw values from an instance

<# 
  this example uses a hashtable to manually translate raw numeric values 
  for property "Win32_IRQResource" to friendly text. This approach is ideal when
  there is just one instance to work with.

  Note: to use other properties than "Win32_IRQResource", look up the appropriate 
  translation hashtable for the property you would like to use instead.
#>

#region define hashtable to translate raw values to friendly text

# Please note: this hashtable is specific for property "Win32_IRQResource" 
# to translate other properties, use their translation table instead
$TriggerLevel_map = @{
      1 = 'Other'
      2 = 'Unknown'
      3 = 'Active Low'
      4 = 'Active High'
}

#endregion define hashtable

# get one instance:
$instance = Get-CimInstance -Class Win32_IRQResource | Select-Object -First 1

<#
  IMPORTANT: this example processes only one instance to illustrate
  the number-to-text translation. To process all instances, replace
  "Select-Object -First 1" with a "Foreach-Object" loop, and use
  the iterator variable $_ instead of $instance
#>

# query the property
$rawValue = $instance.TriggerLevel  

# translate raw value to friendly text:
$friendlyName = $TriggerLevel_map[[int]$rawValue]

# output value
$friendlyName

Use a switch statement inside a calculated property for Select-Object

<# 
  this example uses a switch clause to translate raw numeric 
  values for property "TriggerLevel" to friendly text. The switch
  clause is embedded into a calculated property so there is
  no need to refer to external variables for translation.

  Note: to use other properties than "TriggerLevel", look up the appropriate 
  translation switch clause for the property you would like to use instead.
#>

#region define calculated property (to be used with Select-Object)

<#
  a calculated property is defined by a hashtable with keys "Name" and "Expression"
  "Name" defines the name of the property (in this example, it is "TriggerLevel", but you can rename it to anything else)
  "Expression" defines a scriptblock that calculates the content of this property
  in this example, the scriptblock uses the hashtable defined earlier to translate each numeric
  value to its friendly text counterpart:
#>
 
$TriggerLevel = @{
  Name = 'TriggerLevel'
  Expression = {
    # property is an array, so process all values
    $value = $_.TriggerLevel
    
    switch([int]$value)
      {
        1          {'Other'}
        2          {'Unknown'}
        3          {'Active Low'}
        4          {'Active High'}
        default    {"$value"}
      }
      
  }  
}
#endregion define calculated property

# retrieve all instances...
Get-CimInstance -ClassName Win32_IRQResource | 
  # ...and output properties "Caption" and "TriggerLevel". The latter is defined
  # by the hashtable in $TriggerLevel:
  Select-Object -Property Caption, $TriggerLevel

Use the Enum from above to auto-translate the code values

<# 
  this example translates raw values by means of type conversion
  the friendly names are defined as enumeration using the
  keyword "enum" (PowerShell 5 or better)
  
  The raw value(s) are translated to friendly text by 
  simply converting them into the enum type.
  
  Note: to use other properties than "Win32_IRQResource", look up the appropriate 
  enum definition for the property you would like to use instead.
#>


#region define enum with value-to-text translation:
Enum EnumTriggerLevel
{
  Other         = 1
  Unknown       = 2
  Active_Low    = 3
  Active_High   = 4
}

#endregion define enum

# get one instance:
$instance = Get-CimInstance -Class Win32_IRQResource | Select-Object -First 1

<#
  IMPORTANT: this example processes only one instance to focus on
  the number-to-text type conversion. 
  
  To process all instances, replace   "Select-Object -First 1" 
  with a "Foreach-Object" loop, and use the iterator variable 
  $_ instead of $instance
#>

# query the property:
$rawValue = $instance.TriggerLevel

#region using strict type conversion

<#
  Note: strict type conversion fails if the raw value is 
  not defined by the enum. So if the list of allowable values
  was extended and the enum does not match the value,
  an exception is thrown
#>

# convert the property to the enum **TriggerLevel** 
[EnumTriggerLevel]$rawValue 

# get a comma-separated string:
[EnumTriggerLevel]$rawValue -join ',' 
#endregion

#region using operator "-as"

<#
  Note: the operator "-as" accepts values not defined
  by the enum and returns $null instead of throwing
  an exception
#>

$rawValue -as [EnumTriggerLevel]
#endregion

Enums must cover all possible values. If TriggerLevel returns a value that is not defined in the enum, an exception occurs. The exception reports the value that was missing in the enum. To fix, add the missing value to the enum.

TriggerType

UINT16

IRQ trigger type indicating whether edge-triggered (4) or level-triggered (3) interrupts occur.

TriggerType returns a numeric value. To translate it into a meaningful text, use any of the following approaches:

Use a PowerShell Hashtable

$TriggerType_map = @{
      1 = 'Other'
      2 = 'Unknown'
      3 = 'Level'
      4 = 'Edge'
}

Use a switch statement

switch([int]$value)
{
  1          {'Other'}
  2          {'Unknown'}
  3          {'Level'}
  4          {'Edge'}
  default    {"$value"}
}

Use Enum structure

Enum EnumTriggerType
{
  Other     = 1
  Unknown   = 2
  Level     = 3
  Edge      = 4
}

Examples

Use $TriggerType_map in a calculated property for Select-Object

<# 
  this example uses a hashtable to translate raw numeric values for 
  property "TriggerType" to friendly text

  Note: to use other properties than "TriggerType", look up the appropriate 
  translation hashtable for the property you would like to use instead.
#>

#region define hashtable to translate raw values to friendly text

# Please note: this hashtable is specific for property "TriggerType" 
# to translate other properties, use their translation table instead
$TriggerType_map = @{
      1 = 'Other'
      2 = 'Unknown'
      3 = 'Level'
      4 = 'Edge'
}

#endregion define hashtable

#region define calculated property (to be used with Select-Object)

<#
  a calculated property is defined by a hashtable with keys "Name" and "Expression"
  "Name" defines the name of the property (in this example, it is "TriggerType", but you can rename it to anything else)
  "Expression" defines a scriptblock that calculates the content of this property
  in this example, the scriptblock uses the hashtable defined earlier to translate each numeric
  value to its friendly text counterpart:
#>
 
$TriggerType = @{
  Name = 'TriggerType'
  Expression = {
    # property is an array, so process all values
    $value = $_.TriggerType
    $TriggerType_map[[int]$value]
  }  
}
#endregion define calculated property

# retrieve the instances, and output the properties "Caption" and "TriggerType". The latter
# is defined by the hashtable in $TriggerType: 
Get-CimInstance -Class Win32_IRQResource | Select-Object -Property Caption, $TriggerType

# ...or dump content of property TriggerType:
$friendlyValues = Get-CimInstance -Class Win32_IRQResource | 
    Select-Object -Property $TriggerType |
    Select-Object -ExpandProperty TriggerType

# output values
$friendlyValues

# output values as comma separated list
$friendlyValues -join ', '

# output values as bullet list
$friendlyValues | ForEach-Object { "- $_" }

Use $TriggerType_map to directly translate raw values from an instance

<# 
  this example uses a hashtable to manually translate raw numeric values 
  for property "Win32_IRQResource" to friendly text. This approach is ideal when
  there is just one instance to work with.

  Note: to use other properties than "Win32_IRQResource", look up the appropriate 
  translation hashtable for the property you would like to use instead.
#>

#region define hashtable to translate raw values to friendly text

# Please note: this hashtable is specific for property "Win32_IRQResource" 
# to translate other properties, use their translation table instead
$TriggerType_map = @{
      1 = 'Other'
      2 = 'Unknown'
      3 = 'Level'
      4 = 'Edge'
}

#endregion define hashtable

# get one instance:
$instance = Get-CimInstance -Class Win32_IRQResource | Select-Object -First 1

<#
  IMPORTANT: this example processes only one instance to illustrate
  the number-to-text translation. To process all instances, replace
  "Select-Object -First 1" with a "Foreach-Object" loop, and use
  the iterator variable $_ instead of $instance
#>

# query the property
$rawValue = $instance.TriggerType  

# translate raw value to friendly text:
$friendlyName = $TriggerType_map[[int]$rawValue]

# output value
$friendlyName

Use a switch statement inside a calculated property for Select-Object

<# 
  this example uses a switch clause to translate raw numeric 
  values for property "TriggerType" to friendly text. The switch
  clause is embedded into a calculated property so there is
  no need to refer to external variables for translation.

  Note: to use other properties than "TriggerType", look up the appropriate 
  translation switch clause for the property you would like to use instead.
#>

#region define calculated property (to be used with Select-Object)

<#
  a calculated property is defined by a hashtable with keys "Name" and "Expression"
  "Name" defines the name of the property (in this example, it is "TriggerType", but you can rename it to anything else)
  "Expression" defines a scriptblock that calculates the content of this property
  in this example, the scriptblock uses the hashtable defined earlier to translate each numeric
  value to its friendly text counterpart:
#>
 
$TriggerType = @{
  Name = 'TriggerType'
  Expression = {
    # property is an array, so process all values
    $value = $_.TriggerType
    
    switch([int]$value)
      {
        1          {'Other'}
        2          {'Unknown'}
        3          {'Level'}
        4          {'Edge'}
        default    {"$value"}
      }
      
  }  
}
#endregion define calculated property

# retrieve all instances...
Get-CimInstance -ClassName Win32_IRQResource | 
  # ...and output properties "Caption" and "TriggerType". The latter is defined
  # by the hashtable in $TriggerType:
  Select-Object -Property Caption, $TriggerType

Use the Enum from above to auto-translate the code values

<# 
  this example translates raw values by means of type conversion
  the friendly names are defined as enumeration using the
  keyword "enum" (PowerShell 5 or better)
  
  The raw value(s) are translated to friendly text by 
  simply converting them into the enum type.
  
  Note: to use other properties than "Win32_IRQResource", look up the appropriate 
  enum definition for the property you would like to use instead.
#>


#region define enum with value-to-text translation:
Enum EnumTriggerType
{
  Other     = 1
  Unknown   = 2
  Level     = 3
  Edge      = 4
}

#endregion define enum

# get one instance:
$instance = Get-CimInstance -Class Win32_IRQResource | Select-Object -First 1

<#
  IMPORTANT: this example processes only one instance to focus on
  the number-to-text type conversion. 
  
  To process all instances, replace   "Select-Object -First 1" 
  with a "Foreach-Object" loop, and use the iterator variable 
  $_ instead of $instance
#>

# query the property:
$rawValue = $instance.TriggerType

#region using strict type conversion

<#
  Note: strict type conversion fails if the raw value is 
  not defined by the enum. So if the list of allowable values
  was extended and the enum does not match the value,
  an exception is thrown
#>

# convert the property to the enum **TriggerType** 
[EnumTriggerType]$rawValue 

# get a comma-separated string:
[EnumTriggerType]$rawValue -join ',' 
#endregion

#region using operator "-as"

<#
  Note: the operator "-as" accepts values not defined
  by the enum and returns $null instead of throwing
  an exception
#>

$rawValue -as [EnumTriggerType]
#endregion

Enums must cover all possible values. If TriggerType returns a value that is not defined in the enum, an exception occurs. The exception reports the value that was missing in the enum. To fix, add the missing value to the enum.

Vector

UINT32

Vector of the Windows IRQ resource. A vector contains the memory address to the function that will execute once the interrupt request is acknowledged by the CPU.

Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property IRQNumber, Vector

Examples

List all instances of Win32_IRQResource

Get-CimInstance -ClassName Win32_IRQResource

Learn more about Get-CimInstance and the deprecated Get-WmiObject.

View all properties

Get-CimInstance -ClassName Win32_IRQResource -Property *

View key properties only

Get-CimInstance -ClassName Win32_IRQResource -KeyOnly

Selecting Properties

To select only some properties, pipe the results to Select-Object -Property a,b,c with a comma-separated list of the properties you require. Wildcards are permitted.

Get-CimInstance always returns all properties but only retrieves the ones that you specify. All other properties are empty but still present. That’s why you need to pipe the results into Select-Object if you want to limit the visible properties, i.e. for reporting.

Selecting Properties

The code below lists all available properties. Remove the ones you do not need:

$properties = 'Availability',
              'Caption',
              'CreationClassName',
              'CSCreationClassName',
              'CSName',
              'Description',
              'Hardware',
              'InstallDate',
              'IRQNumber',
              'Name',
              'Shareable',
              'Status',
              'TriggerLevel',
              'TriggerType',
              'Vector'
Get-CimInstance -ClassName Win32_IRQResource | Select-Object -Property $properties

Limiting Network Bandwidth

If you work remotely, it makes sense to limit network bandwidth by filtering the properties on the server side, too:

Get-CimInstance -Class Win32_IRQResource -Property $property | 
Select-Object -Property $property

Selecting Instances

To select some instances, use Get-CimInstance and a WMI Query. The wildcard character in WMI Queries is % (and not “*”).

The parameter -Filter runs a simple query.

Listing all instances where the property Caption starts with “A”

Get-CimInstance -Class Win32_IRQResource -Filter 'Caption LIKE "a%"' 

Using a WQL Query

The parameter -Query uses a query similar to SQL and combines the parameters -Filter and -Property. This returns all instances where the property Caption starts with “A”, and returns the properties specified:

Get-CimInstance -Query "SELECT Hardware, Description, CreationClassName, Vector FROM Win32_IRQResource WHERE Caption LIKE 'a%'"

Any property you did not specify is still present but empty. You might need to use Select-Object to remove all unwanted properties:
Get-CimInstance -Query "SELECT Hardware, Description, CreationClassName, Vector FROM Win32_IRQResource WHERE Caption LIKE 'a%'" | Select-Object -Property Hardware, Description, CreationClassName, Vector

Accessing Remote Computers

To access remote systems, you need to have proper permissions. User the parameter -ComputerName to access one or more remote systems.

Authenticating as Current User

# one or more computer names or IP addresses:
$list = 'server1', 'server2'

# authenticate with your current identity:
$result = Get-CimInstance -ClassName Win32_IRQResource -ComputerName $list 
$result

Authenticating as Different User

Use a CIMSession object to authenticate with a new identity:

# one or more computer names or IP addresses:
$list = 'server1', 'server2'

# authenticate with a different identity:
$cred = Get-Credential -Message 'Authenticate to retrieve WMI information:'
$session = New-CimSession -ComputerName $list -Credential $cred

$result = Get-CimInstance Win32_IRQResource -CimSession $session

# remove the session after use (if you do not plan to re-use it later)
Remove-CimSession -CimSession $session

$result

Learn more about accessing remote computers.

Requirements

To use Win32_IRQResource, the following requirements apply:

PowerShell

Get-CimInstance was introduced with PowerShell Version 3.0, which in turn was introduced on clients with Windows 8 and on servers with Windows Server 2012.

If necessary, update Windows PowerShell to Windows PowerShell 5.1, or install PowerShell 7 side-by-side.

Operating System

Win32_IRQResource was introduced on clients with Windows Vista and on servers with Windows Server 2008.

Namespace

Win32_IRQResource lives in the Namespace Root/CIMV2. This is the default namespace. There is no need to use the -Namespace parameter in Get-CimInstance.

Implementation

Win32_IRQResource is implemented in CIMWin32.dll and defined in CIMWin32.mof. Both files are located in the folder C:\Windows\system32\wbem:

explorer $env:windir\system32\wbem
notepad $env:windir\system32\wbem\CIMWin32.mof

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